JPH0158643B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a stationary induction device with improved cooling effect.

A conventional one is shown in FIG. In the figure, 1 is an iron core, 2 is an inner coil wound around the iron core 1, 3 is an outer coil wound around the outer periphery of the inner coil 2 at a predetermined interval, and 4 is an inner coil 2 and an outer coil 3. A refrigerant reservoir provided in the upper part of the refrigerant reservoir is provided with a plurality of holes through which refrigerant 5 can be distributed to each coil 2, 3. Reference numeral 5 denotes a refrigerant having condensability and placed in the refrigerant reservoir 4 .

In such a transformer, refrigerant 5 is spread over the inner coil 2 and outer coil 3 that generate heat during operation, and the latent heat of vaporization when the refrigerant 5 evaporates causes
Each coil 2, 3 is cooled.

However, as shown in Fig. 2, each coil 2,
The refrigerant 5 spread on the upper surface of each coil 2, 3
Since the droplets are dripped along the inner and outer circumferential surfaces of the coils and are difficult to enter between the layers 2a and 3a of the coils, only the inner and outer circumferential surfaces of each coil 2 and 3 are cooled, resulting in a low cooling effect. Ta.

This invention was made in view of the above, and between the layers of coils stacked at predetermined intervals,
By arranging the guide member, which has a guide wall formed on the periphery of the portion protruding from the coil, so as to protrude alternately from the outer periphery and inner periphery of each layer of the coil, the refrigerant can be efficiently guided between the coil layers. , aims to obtain a stationary induction equipment that can enhance the cooling effect.

Embodiments of the present invention will be described below with reference to the drawings. In FIGS. 3 and 4, 7 is a coil wound to have a predetermined inner diameter and outer diameter, for example, a plurality of outer coils arranged at predetermined intervals around the outer circumference of the inner coil 2. be. 8 is coil 7
This is an insulating guide member disposed between the layers in contact with the coil 7, and is arranged so as to protrude alternately by a predetermined length from the outer periphery and inner periphery of the coil 7. On the periphery of one end of the guide member 8 protruding from the coil 7,
A guide wall 8a having a predetermined height is formed, and the refrigerant 5 is received inside the guide wall 8a and guided between the layers of the coil 7.

With this configuration, as shown in FIG. 3, when the refrigerant 5 is sprayed on the upper part of the coil 7, the upper surface of the coil 7 is cooled by the evaporating refrigerant 5, and the liquid refrigerant 5 is The liquid is dripped along the inner diameter and outer diameter. During this dripping, a part of the refrigerant 5
It is received by guide members 8 protruding from the outer periphery and the inner periphery,
The upper surface of each layer coil 7 is cooled while flowing in opposite directions. Therefore, the guide member 8 is
As shown in FIG. 5, a predetermined number of spacers may be arranged alternately with spacers 9 inserted between each layer of the coil 7 to maintain the spacing. In the one shown in FIG. 6, the guide member 10 is configured to have a predetermined thickness, the spacer 9 is omitted, and the same effect as the above embodiment is expected.

In the above embodiment, a case has been described in which a guide member is placed on the outer coil to cool the top surface of the coil in each layer. You can expect the same effect as in the example.

Further, in the above embodiment, the case of a transformer has been described, but similar effects can be expected for a transformer having one coil, such as a reactor.

As explained above, in the stationary induction device of the present invention, the guide members are arranged so as to protrude alternately from the outer periphery and the inner periphery of each layer of the coil, so that the refrigerant can be guided between the coil layers and the cooling effect can be improved. It has the effect of increasing Further, since the guide wall is formed on the periphery of the portion of the guide member that protrudes from the coil, the refrigerant can be reliably received and efficiently guided between the layers of the coil with a simple structure. Furthermore, there is an effect that the spacer provided between the coil layers can be omitted.

[Brief explanation of drawings]

Fig. 1 is a front view of the conventional device, Fig. 2 is an enlarged partial view of the coil shown in Fig. 1, Fig. 3 is a front view showing an embodiment of the present invention, and Fig. 4 is a partial enlargement of Fig. 3. 5 is a plan view of FIG. 3, and FIG. 6 is a plan view of another embodiment. In the figure, 1 is an iron core, 5 is a refrigerant, 7 is a coil, 8 is a guide member, and 8a is a guide wall. Note that the same reference numerals in each figure indicate the same or equivalent parts.

Claims (1)

[Claims] 1. In stationary induction equipment that cools coils that are wound around an iron core, divided into multiple layers, and stacked vertically at predetermined intervals, by spraying a condensable refrigerant from above, the outer periphery of each layer of the coil. and an inner periphery, a guide wall is formed at the periphery of the protruding portion, and a guide member is provided that receives the refrigerant inside the guide wall and guides the refrigerant between the layers of the coil. Characteristic stationary guidance equipment.